1//===-- Unittests for islower----------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/__support/CPP/span.h"
10#include "src/ctype/islower.h"
11
12#include "test/UnitTest/Test.h"
13
14namespace {
15
16// TODO: Merge the ctype tests using this framework.
17constexpr char LOWER_ARRAY[] = {
18 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
19 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
20};
21
22bool in_span(int ch, LIBC_NAMESPACE::cpp::span<const char> arr) {
23 for (size_t i = 0; i < arr.size(); ++i)
24 if (static_cast<int>(arr[i]) == ch)
25 return true;
26 return false;
27}
28
29} // namespace
30
31TEST(LlvmLibcIsLower, SimpleTest) {
32 EXPECT_NE(LIBC_NAMESPACE::islower('a'), 0);
33
34 EXPECT_EQ(LIBC_NAMESPACE::islower('B'), 0);
35 EXPECT_EQ(LIBC_NAMESPACE::islower('3'), 0);
36 EXPECT_EQ(LIBC_NAMESPACE::islower(' '), 0);
37 EXPECT_EQ(LIBC_NAMESPACE::islower('?'), 0);
38 EXPECT_EQ(LIBC_NAMESPACE::islower('\0'), 0);
39 EXPECT_EQ(LIBC_NAMESPACE::islower(-1), 0);
40}
41
42TEST(LlvmLibcIsLower, DefaultLocale) {
43 // Loops through all characters, verifying that numbers and letters
44 // return non-zero integer and everything else returns a zero.
45 for (int ch = -255; ch < 255; ++ch) {
46 if (in_span(ch, LOWER_ARRAY))
47 EXPECT_NE(LIBC_NAMESPACE::islower(ch), 0);
48 else
49 EXPECT_EQ(LIBC_NAMESPACE::islower(ch), 0);
50 }
51}
52

source code of libc/test/src/ctype/islower_test.cpp